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1.
德州市水资源供需预测分析   总被引:3,自引:0,他引:3  
分析了德州市水资源条件和利用现状,预测了该市2005—2010年的需水量、供水量,并对水资源的供需平衡进行了分析,提出了德州市社会经济可持续发展的水资源利用对策.  相似文献   

2.
通过对柳江流域地下水资源现状进行分析,列出有可能出现的问题,提出要从优化流域产业格局、推动流域生态建设等方面入手,进一步合理开发利用和保护柳江流域地下水资源,实现水资源的可持续发展。  相似文献   

3.
通过对柳江流域地下水资源现状进行分析,列出有可能出现的问题,提出要从优化流域产业格局、推动流域生态建设等方面入手,进一步合理开发利用和保护柳江流域地下水资源,实现水资源的可持续发展。  相似文献   

4.
我国水资源时空分布极不均匀,南方水多、北方水少,汛期洪涝灾害频繁、枯水季节干旱缺水问题突出.由于对地表水和地下水之间的关系以及地下水的资源、生态与环境支撑作用等认识不足,长期以来,重开发、轻保护,产生了一系列问题.目前,地下水资源的过度开发及相关的生态环境问题和地质灾害,已成为制约经济社会可持续发展的重要因素,影响到人民群众的身体健康与生命财产安全.  相似文献   

5.
河北省水资源危机及水资源的可持续利用   总被引:1,自引:0,他引:1  
水资源是基础自然资源,是一个地区综合实力的有机组成部分,随着人口增长和经济的发展,河北省出现了严重的水资源危机:水资源供需矛盾尖锐,地下水超常开采,水污染严重,造成生态环境恶化,制约着经济可持续发展,因此,必须采取措施确保水资源的可持续发展,为河北省可持结发展战略的实施奠定基础。  相似文献   

6.
河北省水资源危机及水资源的可持续利用   总被引:1,自引:0,他引:1  
水资源是基础自然资源 ,是一个地区综合实力的有机组成部分。随着人口增长和经济的发展 ,河北省出现了严重的水资源危机 :水资源供需矛盾尖锐、地下水超常开采、水污染严重 ,造成生态环境恶化 ,制约着经济可持续发展。因此 ,必须采取措施确保水资源的可持续发展 ,为河北省可持续发展战略的实施奠定基础  相似文献   

7.
陆地水     
【知识点击】1.陆地水类型按空间分布分类:地表水和地下水。按循环周期分类:静态水资源(其中,冰川占淡水总量的2/3);动态水资源(人类可利用的主要淡水资源有河流水、淡水湖泊水和浅层地下水)。  相似文献   

8.
河北省水资源主要问题及对策   总被引:1,自引:0,他引:1  
河北省地表、地下水资源短缺,地区分布不均,且水资源浪费和水污染现象严重,这些问题一直困扰着河北省经济的发展。为此,应加强领导,制定和实施水环境保护规划,科学利用水资源,以提高水的重复利用率和效率。  相似文献   

9.
[例1]下列说法正确的是( ) A.水资源是指河流水、淡水湖泊水、浅层地下水 B.水资源是指陆地上各种可以被人们利用的淡水资源 C.水资源不包括冰川和深层地下水 D.静态水资源的循环周期长、更新缓慢,一般不宜开发利用 解析:水资源是指陆地上各种可以被人们利用的淡水资源。水资源除了河流水、淡水湖泊水、浅层地下水之外,还有冰川和深层地下水及咸水湖泊水等。只不过冰川和深层地下水及咸水湖泊水属于静态水资源而已,不能把水资源与目前人们主要利用的淡水资源混为一谈。静态水资源的循环周期长、更新缓慢,一般不  相似文献   

10.
20世纪后期,许多城市迎来了钢筋混凝土的时代,越来越多的人为取代了天然的存在,阻隔了自然与河流的交接、加快水资源的流失、地下水资源严重严重补充不足、水循环难以完整和快速的进行、河流的自净功能锐减,而水利设计作为水利工程建设中的基础,必须注入更多的生态理念,才能构建水资源的可持续发展,同时也是和谐社会建设的必然要求.  相似文献   

11.
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.  相似文献   

12.
风的曲线     
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.  相似文献   

13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.  相似文献   

14.
一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/  相似文献   

15.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?  相似文献   

16.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

17.
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.  相似文献   

18.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

19.
20.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.  相似文献   

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